ipython/ipython — pull request #957 by minrk (2011-10-31 16:42:25+00:00)
Title: allow change of png DPI in inline backend

This moves setting the DPI to the rcParams initialization,
so that it can be changed later by the user, setting
`rcParams['savefig.figsize']`.

DPI has no effect on SVG figures, so any other value will result in
mismatch between svg and png figures. There is already a mismatch in the notebook, where 72 is not the right answer.